Backdoor_Win32_Fynloski_A_2

YARA detection rule by roadwy

Backdoor:Win32/Fynloski.A,SIGNATURE_TYPE_PEHSTR_EXT,06 00 04 00 0d 00 00

rule Backdoor_Win32_Fynloski_A_2{
	meta:
		description = "Backdoor:Win32/Fynloski.A,SIGNATURE_TYPE_PEHSTR_EXT,06 00 04 00 0d 00 00 "
		
	strings :
		$a_03_0 = {8b 06 83 f8 2e 0f 8f ?? ?? 00 00 0f 84 ?? ?? 00 00 83 c0 f8 83 f8 25 0f 87 ?? ?? 00 00 ff 24 } 		$a_01_1 = {81 7d a4 de ca de 43 0f 85 } 		$a_03_2 = {c6 04 18 e9 8b 4d ?? 8b c1 33 d2 52 50 8b c3 99 03 04 24 13 54 24 04 83 c4 08 83 c0 01 83 d2 00 2b f1 83 ee 05 } 		$a_03_3 = {68 7f 74 04 40 8b 45 fc 50 e8 ?? ?? ?? ?? 40 0f 84 ?? ?? 00 00 8b 45 f8 b9 4c 00 00 00 99 f7 f9 48 85 c0 0f 8c } 		$a_01_4 = {23 62 6f 74 43 6f 6d 6d 61 6e 64 25 } 		$a_01_5 = {50 6f 72 74 53 63 61 6e 41 64 64 } 		$a_01_6 = {52 50 43 4c 61 6e 53 63 61 6e } 		$a_01_7 = {57 69 6e 64 6f 77 73 4c 69 76 65 3a 6e 61 6d 65 3d 2a } 		$a_01_8 = {44 44 4f 53 48 54 54 50 46 4c 4f 4f 44 } 		$a_01_9 = {44 44 4f 53 53 59 4e 46 4c 4f 4f 44 } 		$a_01_10 = {44 44 4f 53 55 44 50 46 4c 4f 4f 44 } 		$a_01_11 = {41 63 74 69 76 65 4f 66 66 6c 69 6e 65 4b 65 79 6c 6f 67 67 65 72 } 		$a_01_12 = {43 6f 6d 65 74 20 52 41 54 20 4c 65 67 61 63 79 20 69 73 20 61 6c 72 65 61 64 79 20 61 63 74 69 76 65 20 69 6e 20 79 6f 75 72 20 73 79 73 74 65 6d } 	condition:
		((#a_03_0  & 1)*2+(#a_01_1  & 1)*2+(#a_03_2  & 1)*2+(#a_03_3  & 1)*2+(#a_01_4  & 1)*2+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1+(#a_01_11  & 1)*1+(#a_01_12  & 1)*-10) >=4
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

a62844a3-f7f4-4120-adbe-c5b05a743ff2

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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